Android dumpsys使用

一、dumpsys命令介绍

1.命令介绍

dumpsys是一种重要的调试安卓系统的工具，通过它可以得知你想知道的系统服务的一些信息，如输入dumpsys cpuinfo就可以得到当前CPU的使用信息。
命令格式： adb shell dumpsys [system serbices]

2.服务信息查询和介绍

常用的dumpsys指令如下所示：

 adb shell dumpsys -h                            查询指令帮手adb shell dumpsys                             查询系统中所有的服务信息，信息太多，一般不这么用adb shell dumpsys -l                          查询支持dumpsys的系统服务列表adb shell dumpsys [service] --help                某服务查询指令使用帮助adb shell dumpsys [service] [cmd]                查询某服务的相关信息

二、核心服务信息查询

查询dumpsys指令使用帮助：adb shell dumpsys --help

C:\Users\uluxy181> adb shell dumpsys --help
usage: dumpsysTo dump all services.
or:dumpsys [-t TIMEOUT] [--priority LEVEL] [--pid] [--help | -l | --skip SERVICES | SERVICE [ARGS]]--help: shows this help-l: only list services, do not dump them-t TIMEOUT_SEC: TIMEOUT to use in seconds instead of default 10 seconds-T TIMEOUT_MS: TIMEOUT to use in milliseconds instead of default 10 seconds--pid: dump PID instead of usual dump--proto: filter services that support dumping data in proto format. Dumpswill be in proto format.--priority LEVEL: filter services based on specified priorityLEVEL must be one of CRITICAL | HIGH | NORMAL--skip SERVICES: dumps all services but SERVICES (comma-separated list)SERVICE [ARGS]: dumps only service SERVICE, optionally passing ARGS to it`

1.package包信息查询

adb shell dumpsys package --help 输入指令后，指导信息如下所示

C:\Users\uluxy181> adb shell dumpsys package -h
Package manager dump options:[-h] [-f] [--checkin] [--all-components] [cmd] ...--checkin: dump for a checkin-f: print details of intent filters-h: print this help--all-components: include all component names in package dumpcmd may be one of:apex: list active APEXes and APEX session statel[ibraries]: list known shared librariesf[eatures]: list device featuresk[eysets]: print known keysetsr[esolvers] [activity|service|receiver|content]: dump intent resolversperm[issions]: dump permissionspermission [name ...]: dump declaration and use of given permissionpref[erred]: print preferred package settingspreferred-xml [--full]: print preferred package settings as xmlprov[iders]: dump content providersp[ackages]: dump installed packagesq[ueries]: dump app queryability calculationss[hared-users]: dump shared user IDsm[essages]: print collected runtime messagesv[erifiers]: print package verifier infod[omain-preferred-apps]: print domains preferred appsi[ntent-filter-verifiers]|ifv: print intent filter verifier infoversion: print database version infowrite: write current settings nowinstalls: details about install sessionscheck-permission <permission> <package> [<user>]: does pkg hold perm?dexopt: dump dexopt statecompiler-stats: dump compiler statisticsservice-permissions: dump permissions required by services<package.name>: info about given package

2.activity信息查询

adb shell dumpsys activity --help 输入指令后，指导信息如下所示:

C:\Users\uluxy181> adb shell dumpsys activity -h
Activity manager dump options:[-a] [-c] [-p PACKAGE] [-h] [WHAT] ...WHAT may be one of:a[ctivities]: activity stack stater[recents]: recent activities stateb[roadcasts] [PACKAGE_NAME] [history [-s]]: broadcast statebroadcast-stats [PACKAGE_NAME]: aggregated broadcast statisticsi[ntents] [PACKAGE_NAME]: pending intent statep[rocesses] [PACKAGE_NAME]: process stateo[om]: out of memory managementperm[issions]: URI permission grant stateprov[iders] [COMP_SPEC ...]: content provider stateprovider [COMP_SPEC]: provider client-side states[ervices] [COMP_SPEC ...]: service stateallowed-associations: current package association restrictionsas[sociations]: tracked app associationsexit-info [PACKAGE_NAME]: historical process exit informationlmk: stats on low memory killerlru: raw LRU process listbinder-proxies: stats on binder objects and IPCssettings: currently applied config settingsservice [COMP_SPEC]: service client-side statepackage [PACKAGE_NAME]: all state related to given packageall: dump all activitiestop: dump the top activityWHAT may also be a COMP_SPEC to dump activities.COMP_SPEC may be a component name (com.foo/.myApp),a partial substring in a component name, ahex object identifier.-a: include all available server state.-c: include client state.-p: limit output to given package.--checkin: output checkin format, resetting data.--C: output checkin format, not resetting data.--proto: output dump in protocol buffer format.--autofill: dump just the autofill-related state of an activity

3.window信息查询

adb shell dumpsys window -h

C:\Users\uluxy181> adb shell dumpsys window -h
Window manager dump options:[-a] [-h] [cmd] ...cmd may be one of:l[astanr]: last ANR informationp[policy]: policy statea[animator]: animator states[essions]: active sessionssurfaces: active surfaces (debugging enabled only)d[isplays]: active display contentst[okens]: token listw[indows]: window listtrace: print trace status and write Winscope trace to filecmd may also be a NAME to dump windows.  NAME maybe a partial substring in a window name, aWindow hex object identifier, or"all" for all windows, or"visible" for the visible windows."visible-apps" for the visible app windows.-a: include all available server state.--proto: output dump in protocol buffer format.

三、实现自定义服务dumpsys信息查询

如果期望自己的功能服务也能通过dumpsys指令打印关键信息，方法如下：
1、需要实现的服务必须继承binder；
2、重写dump()方法，在方法里加入想要打印的信息；
3、将这个服务对象添加到ServiceManager里；

        ServiceManager.addService("yfve_excpert_service", new TestDumpsys());}private static final class TestDumpsys extends Binder {void TestDumpsys() {LogUtil.i(TAG, "TestDumpsys ");}@Overrideprotected void dump(FileDescriptor fd, PrintWriter fout, String[] args) {//super.dump(fd, fout, args);fout.println("*dump excpert TestDumpsys  service*");}}

按上面步骤加完服务所需要打印的内容，解决掉遇到selinux问题。运行服务后，通过dumpsys - l指令可以查看是否添加完成。我着demo里添加的dumpsys服务名字叫yfve_excpert_service；

C:\Users\uluxy181> adb shell dumpsys -l...webviewupdatewifiwifinl80211wifip2pwifiscannerwindowyfve_core_serviceyfve_excpert_service
C:\Users\uluxy181>

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